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(Article of periodic en Anglais - 2009)

Document title

Pie de Palo, Argentina : a cataclastic diapir

Authors(s) and Affiliation(s)

VITA-FINZI C. (1) ;
(1) Dep. of Mineralogy, Natural History Museum, London, ROYAUME-UNI

Abstract

The term cataclastic diapirism is proposed for the low-temperature extrusion of highly fractured rocks through more competent strata to produce domed topographies at the surface. The process is illustrated by reference to the geomorphology, neotectonics and microseismicity of the Pie de Palo, an elongated ridge in the western Sierras Pampeanas of Argentina composed of shattered and sheared Lower Palaeozoic rocks and subject to coseismic uplift. The Pie de Palo is conventionally interpreted as a fault-driven basement fold linked to low-angle eastward subduction of the Nazca plate beneath South America; the diapiric model implies instead that deformation is powered by regional compression from west-verging, near-surface, crustal shortening which results ultimately from Atlantic spreading

Source

Article of periodic

published at : Geomorphology / ISSN 0169-555X

Editor : Elsevier, Amsterdam - PAYS-BAS (1987)

Millesime : 2009, vol. 104, no3-4 [pp. 317-322]

Bibliographic references : 1 p.

Collation : 5 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 21151

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.geomorph.2008.09.006

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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